Do taped seams need to be foamed
I’m getting ready to put blow in cellulose into the attic and while getting wires and conduit etc thru, I turned off the lights in the attic and noticed I could see light thru the seams of the plywood ceiling I installed. The plywood seams were all taped with 3m 3″ tape. My question is do these seams in the attic need to be foamed also or is the tape sufficient to keep the air seal intact.
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